<!DOCTYPE html>
<html>
<head>
    <meta charset="UTF-8">
</head>
<body>
<script>
    const bt = 'property';
    new class {
        constructor (e) {
        }
    }({
        features: [class {
            constructor () {
            }

            #e () {
            }

            test () {
                return this[bt];
            }
        }],
    })
</script>
</body>
</html>
